US12151065B2 - Mask system with removable headgear connector - Google Patents

Abstract

A mask system may deliver a supply of air generated by a flow generator at a positive pressure in a therapeutic range to a patient's airways to treat sleep disordered breathing. The mask system may include: a cushion, a mask frame attached to the cushion, the mask frame having a front surface opposite the cushion and a bore projecting from the front surface to form a hole, and the mask frame having a curved interfacing structure projecting radially from the bore, and said mask frame having no built-in or integral headgear attachment points, headgear, an elbow assembly, and a headgear connector detachably connected to the mask frame by translating the mask frame and the headgear connector towards one another, wherein the mask frame and the headgear connector are constructed to resist movement between the mask frame and the headgear connector when said mask frame and said headgear connector are attached.

Description

CROSS-REFERENCE TO APPLICATION

This application is a continuation of U.S. application Ser. No. 17/098,615, filed Nov. 16, 2020, now U.S. Pat. No. 11,992,618, which is a continuation of U.S. application Ser. No. 15/892,601, filed Feb. 9, 2018, now U.S. Pat. No. 10,864,342, which is a continuation of U.S. application Ser. No. 14/594,284, filed Jan. 12, 2015, now U.S. Pat. No. 9,937,315, which is a continuation of U.S. application Ser. No. 13/904,748, filed May 29, 2013, now U.S. Pat. No. 8,960,196, which is a continuation of U.S. application Ser. No. 12/010,680, filed Jan. 29, 2008, now U.S. Pat. No. 8,517,023, which claims the benefit of U.S. Provisional Application No. 60/898,108, filed Jan. 30, 2007, each of which are incorporated herein by reference in their entirety.

FIELD OF THE INVENTION

The present invention relates to a mask system used for treatment, e.g., of Sleep Disordered Breathing (SDB) with Continuous Positive Airway Pressure (CPAP) or Non-Invasive Positive Pressure Ventilation (NIPPV).

BACKGROUND OF THE INVENTION

Patient interfaces, such as a full-face or nasal mask systems, for use with blowers and flow generators in the treatment of sleep disordered breathing (SDB), typically include a soft face-contacting portion, such as a cushion, and a rigid shell or frame. In use, the interface is held in a sealing position by headgear so as to enable a supply of air at positive pressure (e.g., 2-30 cm H₂O) to be delivered to the patient's airways.

One factor in the efficacy of therapy and compliance of patients with therapy is the comfort and fit of the patient interface. It has been necessary to design a wide variety of interfaces to best treat and/or suit the patient's needs. While there are a large number of interfaces, typically each frame has been specifically designed to be used with only a single headgear. That is, only one headgear will work correctly with a given frame due to headgear vectors. This is because the frame will have connection points for the headgear located on the frame, and there is a limited way of routing the headgear off these connection points to achieve correct sealing vectors.

PCT Publication No. WO 02/45784, which is incorporated herein by reference in its entirety, discloses a patient mask assembly including a wire brace which clips to the mask and provides attachment locations for headgear straps in alternative positions to those attachment locations which may be provided by the mask.

The present invention provides alternative arrangements of mask systems to enhance the efficacy of therapy and compliance of patients with therapy.

SUMMARY OF THE INVENTION

One aspect of the invention relates to a mask system that can be adapted for use with a variety of different styles or types of headgear.

Another aspect of the invention relates to a mask system for delivering breathable gas to a patient. The mask system includes a common frame provided without built-in or integral headgear attachment points and at least first and second headgear connectors adapted to be provided to the frame. Each of the at least first and second headgear connectors are adapted to attach headgear straps of headgear. The at least first and second headgear connectors are different from one another in at least one aspect.

Another aspect of the invention relates to a mask system for delivering breathable gas to a patient. The mask system includes at least first and second headgear connectors adapted to attach headgear straps of headgear and a common frame structured to support each of the at least first and second headgear connectors. The at least first and second headgear connectors are different from one another in at least one aspect. Each of the headgear connectors is constructed of a similar material as the frame.

Another aspect of the invention relates to a mask system for delivering breathable gas to a patient. The mask system includes at least first and second headgear connectors adapted to attach headgear straps of headgear and a common frame structured to support each of the at least first and second headgear connectors. The at least first and second headgear connectors are different from one another in at least one aspect. Each of the headgear connectors includes at least one headgear clip receptacle adapted to be engaged with a clip provided to a headgear strap.

Another aspect of the invention relates to a mask system for delivering breathable gas to a patient. The mask system includes at least first and second headgear connectors adapted to attach headgear straps of headgear and a common frame structured to support each of the at least first and second headgear connectors. The at least first and second headgear connectors are different from one another in at least one aspect. The frame includes a central bore adapted to engage an elbow assembly. Each of the headgear connectors includes an opening adapted to removably engage a flange or interfacing structure provided along the central bore of the frame.

Another aspect of the invention relates to a kit including at least first and second headgear connectors adapted to attach headgear straps of headgear, a common frame structured to support each of the at least first and second headgear connectors, a sealing interface or cushion provided to the frame, and at least first and second headgear adapted to attach to a respective one of the at least first and second headgear connectors. The at least first and second headgear connectors are different from one another in at least one aspect.

Another aspect of the invention relates to a method for fitting a mask system to a patient. The method includes providing a common frame without built-in or integral headgear attachment points, selecting headgear based on a preferred headgear style, providing a headgear connector adapted to be provided to the frame and adapted to attach headgear straps of the selected headgear.

Other aspects, features, and advantages of this invention will become apparent from the following detailed description when taken in conjunction with the accompanying drawings, which are a part of this disclosure and which illustrate, by way of example, principles of this invention.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings facilitate an understanding of the various embodiments of this invention. In such drawings:

FIGS.1A- to1C illustrate a mask system with interchangeable headgear connectors according to an embodiment of the present invention;

FIGS.1D-1 to1D-5 illustrate headgear connectors according to alternative embodiments of the present invention;

FIGS.2A to5B illustrate a common frame with interchangeable headgear connectors for a mask system according to another embodiment of the present invention;

FIGS.6A to6D-2 illustrate a common frame with interchangeable headgear connectors for a mask system according to another embodiment of the present invention; and

FIGS.7A to7C illustrate a common frame with interchangeable and slidable headgear connectors for a mask system according to another embodiment of the present invention.

DETAILED DESCRIPTION OF ILLUSTRATED EMBODIMENTS

The following description is provided in relation to several embodiments which may share common characteristics and features. It is to be understood that one or more features of any one embodiment may be combinable with one or more features of the other embodiments. In addition, each single feature or combination of features in any of the embodiments may constitute an additional embodiment.

While each embodiment below is described as including a full-face or nasal interface type, each embodiment may be adapted for use with other suitable interface types. That is, the interface type is merely exemplary, and each embodiment may be adapted to include other interface types, e.g., mouth masks, nasal prongs, etc.

In this specification, the word “comprising” is to be understood in its “open” sense, that is, in the sense of “including”, and thus not limited to its “closed” sense, that is the sense of “consisting of”. A corresponding meaning is to be attributed to the corresponding words “comprise”, “comprised” and “comprises” where they appear.

1. First Embodiment of Common Frame and Interchangeable Headgear Connector

FIGS.1A to1C illustrate amask system10 including interchangeable headgear connectors according to an embodiment of the present invention. In this embodiment, themask system10 includes a full-face interface. Themask system10 includes a common oruniversal frame20, acushion30 provided to theframe20 and adapted to form a seal with the patient's face, anelbow assembly40 provided to theframe20 and adapted to be connected to an air delivery tube (not shown) that delivers breathable gas to the patient, one of three headgear connectors50(1),50(2),50(3) removably attachable to theframe20, and one of three headgear60(1),60(2),60(3) removably attachable a respective one of the headgear connectors50(1),50(2),50(3). This arrangement allows multiple headgear styles to be used with one frame so that different headgear may be mixed and matched with the frame, e.g., depending on patient preference and/or fit. Themask system10 is intended for use in positive pressure therapy for users with obstructive sleep apnea (OSA) or another respiratory disorder.

Thecommon frame20 includes amain body22, a lower bore or annularelbow connection seal24 adapted to engage theelbow assembly40, avent assembly26 for gas washout, and supplemental ports covered by respective port caps28. Moreover, thecommon frame20 is structured to be selectively and removably coupled to one of three headgear connectors50(1),50(2),50(3) adapted for use with a respective headgear60(1),60(2),60(3). The three headgear60(1),60(2),60(3) may differ in at least one respect from one another such that one may be more suitable or preferable for use with one patient, while another may be more suitable or preferable for use with another patient.

Specifically, theframe20 includes a ledge or other interfacing structure along its peripheral edge that is adapted to removably connect to each of three different headgear connectors50(1),50(2),50(3) (also referred to as headgear attachment clips). For example, the interfacing structure of theframe20 may engage each headgear connector50(1),50(2),50(3) with a friction fit, snap-fit, mechanical interlock, or other suitable attachment mechanism. The interfacing structure of theframe20 does not need to be continuous, but is structured such that multiple headgear connectors can connect thereto.

Each headgear connector50(1),50(2),50(3) includes headgear attachment points55 along its perimeter that differ in at least one respect from the other headgear connectors. That is, each headgear connector50(1),50(2),50(3) includes different headgear attachment points55 to allow different style headgear to be used therewith and hence with theframe20. In the illustrated embodiment, eachheadgear attachment point55 is in the form of an opening through which a strap of the headgear may pass and be removably connected. In use, a selected one of the headgear connectors50(1),50(2),50(3) is attached to theframe20, and headgear60(1),60(2),60(3) having headgear straps associated with such headgear connector50(1),50(2),50(3) is attached to the headgear connector50(1),50(2),50(3) to maintain themask system10 in a desired position on the patient's face.

InFIG.1A, the headgear connector50(1) includes upper and lower attachment points55 on each side thereof. As illustrated, this headgear connector50(1) is structured for use with headgear60(1) including a pair of upper and lower side straps62,64 that are attachable to respective upper and lower attachment points55 of the headgear connector50(1). In use, the upper side straps62 extend over the patient's ears and the lower side straps64 extend below the patient's ears. The headgear60(1) also includes arear portion68 having straps adapted to cup the occiput of the patient's head in use.

InFIG.1B, the headgear connector50(2) includes aside attachment point55 on each side thereof and atop attachment point55. As illustrated, this headgear connector50(2) is structured for use with headgear60(2) including a pair of side straps62 that are attachable to respective side attachment points55 and atop strap66 that is attachable to thetop attachment point55. In use, the side straps62 extend below the patient's ears and the top strap extends between the patient's eyes and across the patient's forehead. The headgear60(2) also includes arear portion68 adapted to cup the occiput of the patient's head in use.

InFIG.1C, the headgear connector50(3) includes aside attachment point55 on each side thereof. As illustrated, this headgear connector50(3) is structured for use with headgear60(3) including a pair of side straps62 that are attachable to respective side attachment points55. In use, the side straps62 extend over the patient's ears. The headgear60(3) also includes arear portion68 having straps adapted to cup the occiput of the patient's head in use.

As shown inFIG.1C, eachside strap62 includes arigidizer65 to improve stability. Therigidizer65 may be constructed of a rigid or semi-rigid material, e.g., nylon or plastic, and may be attached to the strap in any suitable manner, e.g., stitching, welding, gluing, or mechanically fixed. It should be appreciated that each headgear style may include one or more straps with a rigidizer to improve stability.

In an embodiment, each headgear connector50(1),50(2),50(3) is constructed of a similar material as theframe20, e.g., substantially rigid, non-malleable, plastic material (e.g., polycarbonate). However, the headgear connectors and frame may be constructed of other suitable materials.

In an embodiment, the headgear connector may also constitute a cushion clip that is adapted to retain thecushion30 to theframe20. For example, the headgear connector may include structure similar to the clip disclosed in U.S. Pat. No. 6,412,487, which is incorporate herein by reference in its entirety. However, it should be appreciated that thecushion30 may be secured to theframe20 in other suitable manners.

FIGS.1D-1 to1D-5 illustrate headgear connectors according to alternative embodiments of the present invention. InFIG.1D-1, the headgear connector150(1) is in the form of a cushion clip adapted to retain thecushion30 to theframe20. The headgear connector150(1) includes a plurality oftabs144 structured to attach to theframe20 with a snap-fit. Moreover, the headgear connector150(1) includesopenings155 through which respective straps of the headgear may pass and be removably connected. As illustrated, theopenings155 are arranged similar to those on the headgear connector50(1) shown inFIG.1A.

InFIG.1D-2, the headgear connector150(2) is in the form of a cushion clip adapted to retain thecushion30 to theframe20. The headgear connector150(2) includes a plurality oftabs144 structured to attach to theframe20 with a snap-fit. Moreover, the headgear connector150(2) includes anchors or cross-bars146 for attaching respective straps of the headgear. As illustrated, theanchors146 are arranged similar to the openings on the headgear connector50(1) shown inFIG.1A.

InFIG.1D-3, the headgear connector150(3) is in the form of a cushion clip adapted to retain thecushion30 to theframe20. The headgear connector150(3) includes a plurality oftabs144 structured to attach to theframe20 with a snap-fit. Moreover, the headgear connector150(3) includes anchors or cross-bars146 for attaching respective straps of the headgear. As illustrated, theanchors146 are arranged similar to the openings on the headgear connector50(2) shown inFIG.1B.

InFIG.1D-4, the headgear connector150(4) is in the form of a cushion clip adapted to retain thecushion30 to theframe20. The headgear connector150(4) includes a plurality oftabs144 structured to attach to theframe20 with a snap-fit. Moreover, the headgear connector150(4) includes anchors or cross-bars146 for attaching respective straps of the headgear. As illustrated, theanchors146 are arranged similar to the openings on the headgear connector50(3) shown inFIG.1C.

InFIG.1D-5, the headgear connector150(5) is in the form of a cushion clip adapted to retain thecushion30 to theframe20. The headgear connector150(5) includes a plurality oftabs144 structured to attach to theframe20 with a snap-fit. Moreover, the headgear connector150(5) includes anchors or cross-bars146 for attaching respective side straps of the headgear. In addition, the headgear connector150(5) includes anextension148 that provides a plurality ofopenings149 for attaching one or more upper straps of the headgear.

It should be appreciated that the illustrated headgear60(1),60(2),60(3) are merely exemplary and other headgear arrangements are possible for use with the illustrated headgear connectors. Also, while the mask system is described as including three different headgear connectors for use with respective headgear, it should be appreciated that the mask system may include any suitable number of headgear connectors for use with associated headgear, e.g., at least two headgear connectors.

The common oruniversal frame20 is advantageous since it works with a plurality of different headgear via a respective headgear connector, thereby eliminating the need to specifically make the frame for a particular headgear, as is the standard. That is, the mask or frame/cushion/elbow sub-assembly is independent of the headgear, which allows independent selection of the frame/cushion/elbow sub-assembly and the headgear. Therefore, the frame/cushion/elbow sub-assembly may be selected based on the desired mask seal of the patient and the headgear may be selected based on the desired fit or support arrangement. This allows the patient to achieve both a good seal and a secure, comfortable fit, rather than compromising between one or the other, as is typically the case. This arrangement improves comfort, efficacy of treatment, and compliance. In addition, the attachment points provided by the headgear connector are associated with a specific headgear so that correct sealing vectors may be achieved.

In an embodiment, the frame/cushion/elbow sub-assembly may be provided separately from the headgear connector50(1),50(2),50(3) and associated headgear60(1),60(2),60(3) (e.g., sold separately). This arrangement allows the patient to select headgear based on a preferred headgear style, and then be provided with an associated headgear connector for connection to the frame/cushion/elbow sub-assembly.

2. Second Embodiment of Common Frame and Interchangeable Headgear Connector

FIGS.2A to5B illustrate a common oruniversal frame220 with interchangeable headgear connectors250(1),250(2),250(3),250(4) for a mask system according to another embodiment of the present invention. In this embodiment, the mask system includes a nasal interface. Similar to the embodiment described above, this arrangement allows multiple headgear styles to be used with one frame so that different headgear may be mixed and matched with the frame, e.g., depending on patient preference and/or fit. In addition, this arrangement allows the use of different accessories, e.g., forehead support.

Thecommon frame220 includes amain body222 and a central bore or annularelbow connection seal224 adapted to engage an elbow assembly. Thecommon frame220 has a front surface (unnumbered) associated therewith. Moreover, thecommon frame220 is structured to be selectively and removably coupled to one of multiple headgear connectors250(1),250(2),250(3),250(4) adapted for use with a respective headgear and/or accessory. Thecentral bore224 has a longitudinal axis.

Specifically, thecentral bore224 of theframe220 includes a flange or interfacingstructure225 along its peripheral edge that is adapted to removably connect to each of the multiple headgear connectors250(1),250(2),250(3),250(4) (also referred to as headgear attachment clips). Thecommon frame220 further has a circumferential, outer surface (unnumbered) that is spaced from thecentral bore224 and that extends from the front surface to theinterfacing structure225. The circumferential, outer surface is parallel to the longitudinal axis of thecentral bore224. In the illustrated embodiment, each headgear connector250(1),250(2),250(3),250(4) includes anopening252, which is circular inFIGS.2A,3A,4A, and5A, adapted to engage theinterfacing structure225 with a friction fit, snap-fit, mechanical interlock, or other suitable attachment mechanism. However, other suitable arrangements for attaching each headgear connector to the frame are possible.

Each headgear connector250(1),250(2),250(3),250(4) includes headgear and/or accessory attachment points along its perimeter that differ in at least one respect from the other headgear connectors. That is, each headgear connector250(1),250(2),250(3),250(4) includes different headgear and/or accessory attachment points to allow different style headgear and/or accessories to be used therewith and hence with theframe220. In use, a selected one of the headgear connectors250(1),250(2),250(3),250(4) is attached to theframe220, and headgear or accessories associated with such headgear connector250(1),250(2),250(3),250(4) is attached to the headgear connector250(1),250(2),250(3),250(4) to maintain the mask system in a desired position on the patient's face.

While the mask system is described as including four different headgear connectors250(1),250(2),250(3),250(4) for use with respective headgear and/or accessories, it should be appreciated that the mask system may include any suitable number of headgear connectors for use with associated headgear and/or accessories, e.g., at least two headgear connectors.

2.1 Headgear Connector with Adjustable Forehead Support

InFIGS.2A-2B, the headgear connector250(1) is structured to allow the use of an adjustable forehead support. Specifically, the headgear connector250(1) includes an upper support member orinterface270 adapted to support a forehead support272 (e.g., seeFIG.2B), lowerheadgear clip receptacles274 adapted to be engaged with respective clips276 (e.g., seeFIG.2B) provided to lower side straps of the headgear (not shown), and theopening252 structured to engage theinterfacing structure225 of theframe220.

In use, the headgear connector250(1) is attached to theframe220, theforehead support272 is adjustably mounted to theupper support member270 of the headgear connector250(1) to provide a support and stability mechanism between the mask system and the patient's forehead, and headgear having headgear straps associated with such headgear connector250(1) andforehead support272 is attached to the headgear connector250(1) andforehead support272 to maintain the mask system in a desired position on the patient's face. As illustrated, the headgear connector250(1) andforehead support272 are structured for use with headgear including a pair of lower side straps attached torespective clips276 and a pair of upper side straps attached torespective openings273 on theforehead support272.

2.2 Headgear Connector with Fixed Forehead Support

InFIGS.3A-3B, the headgear connector250(2) includes a fixed forehead support. Specifically, the headgear connector250(2) includes a fixedforehead support272 havingopenings273 for attaching respective upper side straps of the headgear, lowerheadgear clip receptacles274 adapted to be engaged with respective clips276 (e.g., seeFIG.3B) provided to lower side straps of the headgear (not shown), and theopening252 structured to engage theinterfacing structure225 of theframe220.

In use, the headgear connector250(2) is attached to theframe220 and headgear having headgear straps associated with such headgear connector250(2) is attached to the headgear connector250(2) to maintain the mask system in a desired position on the patient's face. As illustrated, the headgear connector250(2) and itsfixed forehead support272 are structured for use with headgear including a pair of lower side straps attached torespective clips276 and a pair of upper side straps attached torespective openings273 on the fixedforehead support272.

2.3 Symmetrical Headgear Connector

InFIGS.4A-4B, the headgear connector250(3) includes a substantially symmetrical arrangement. Specifically, the headgear connector250(3) includesheadgear clip receptacles274 on each side thereof adapted to be engaged with clips (not shown) provided to side straps of the headgear (not shown) and theopening252 structured to engage theinterfacing structure225 of theframe220.

In use, the headgear connector250(3) is attached to theframe220 and headgear having headgear straps associated with such headgear connector250(3) is attached to the headgear connector250(3) to maintain the mask system in a desired position on the patient's face. As illustrated, the headgear connector250(3) is structured for use with headgear including a pair of side straps attached to respective clips associated with theclip receptacles274.

The headgear connector250(3) is substantially symmetrical about its horizontal and vertical axes such that it may be rotated between two positions with respect to theframe220, i.e., rotated 180° about its center. In each position, theheadgear clip receptacles274 will be correctly oriented, i.e., extend laterally.

2.4 Headgear Connector with Chin Support/Mouth Seal/Mandibular Device

InFIGS.5A-5B, the headgear connector250(4) is structured to allow the use of an adjustable forehead support and a chin support, mouth seal, and/or mandibular device, for example. Specifically, the headgear connector250(4) includes an upper support member orinterface270 adapted to support a forehead support (e.g., such as theforehead support272 shown inFIG.2B), lowerheadgear clip receptacles274 adapted to be engaged with clips (e.g., such as theclips276 shown inFIG.2B) provided to lower side straps of the headgear (not shown), theopening252 structured to engage theinterfacing structure225 of theframe220, and alower clip receptacle278 positioned at the bottom of the headgear connector250(4) between theheadgear clip receptacles274 and adapted to be engaged with a clip provided to a chin support, mouth seal, and/or mandibular device, for example.

In use, the headgear connector250(4) is attached to theframe220, a forehead support is adjustably mounted to theupper support member270 of the headgear connector250(4) to provide a support and stability mechanism between the mask system and the patient's forehead, a chin support, mouth seal, and/or mandibular device, for example, is attached to the headgear connector250(4) via thelower clip receptacle278, and headgear having headgear straps associated with such headgear connector250(4) and forehead support is attached to the headgear connector250(4) and forehead support to maintain the mask system in a desired position on the patient's face. The headgear connector250(4) and forehead support are structured for use with headgear including a pair of lower side straps attached to respective clips associated with theclip receptacles274 and a pair of upper side straps attached to the forehead support.

Thelower clip receptacle278 allows the attachment of devices structured to be positioned at the bottom of the mask system, e.g., below the nose and/or mouth. As noted above, such devices may include a chin support, mouth seal, and/or mandibular device. However, thelower clip receptacle278 may be structured to support other suitable devices, e.g., chin restraint, chin strap, etc.

2.5 Alternatives

In alternative embodiments, each headgear connector250(1),250(2),250(3),250(4) may provide openings in place of headgear clip receptacles through which straps of the headgear may pass and be removably connected, e.g., if headgear clips are not desired. Also, the forehead support provided to associated headgear connectors may provide headgear clip receptacles in place of openings for attaching headgear straps.

3. Third Embodiment of Common Frame and Interchangeable Headgear Connector

FIGS.6A to6D-2 illustrate a common oruniversal frame320 with interchangeable headgear connectors350(1),350(2),350(3) for a mask system according to another embodiment of the present invention. In this embodiment, the mask system includes a nasal interface. Similar to the embodiments described above, this arrangement allows multiple headgear styles to be used with one frame so that different headgear may be mixed and matched with the frame, e.g., depending on patient preference and/or fit.

Thecommon frame320 includes amain body322 and a central bore or annularelbow connection seal324 adapted to engage an elbow assembly. Moreover, thecommon frame320 is structured to be selectively and removably coupled to one or more headgear connectors350(1),350(2),350(3) (also referred to as attachment clips). The one or more headgear connectors350(1),350(2),350(3) are selectively arranged on theframe320 for use with a respective headgear.

Specifically, theframe320 includes multiple interfacing structures380(1),380(2),380(3) that are adapted to removably connect to a respective one of the headgear connectors350(1),350(2),350(3). The interfacing structures380(1),380(2),380(3) are located in various positions around theframe320 so that the headgear connectors350(1),350(2),350(3) are attachable to theframe320 in different positions with respect to one another for use with different headgear arrangements.

In the illustrated embodiment, each interfacing structure380(1),380(2),380(3) provides one or more protrusions having a profile, shape, or arrangement that differs in at least one respect from the other interfacing structures. For example, the first interfacing structure380(1) at the upper side of the frame provides an elongated, oval-shaped protrusion, the second interfacing structure380(2) at the lower side of the frame provides an hourglass-shaped or number eight-shaped protrusion, and the third interfacing structure380(3) at the top of the frame provides spaced apart pegs or pins.

Each headgear connector350(1),350(2),350(3) includes one or more openings having a profile, shape, or arrangement that corresponds to a respective one of the interfacing structures380(1),380(2),380(3). Thus, each headgear connector350(1),350(2),350(3) may attach to the frame in only one orientation to prevent misassembly. That is, the profile, shape, or arrangement of the protrusion/opening provides a keyed arrangement to facilitate assembly of the headgear connector to the frame in the correct position and orientation.

InFIGS.6B-1 and6B-2, the headgear connector350(1) includes aheadgear clip receptacle354 adapted to be engaged with a clip (not shown) provided to a strap of the headgear (not shown), an elongated, oval-shaped opening356(1) adapted to be engaged with the first interfacing structure380(1) at the upper side of the frame, and a cutout358(1) adapted to be engaged with an upper portion of the second interfacing structure380(2) at the lower side of the frame. The opening356(1) and cutout358(1) of the headgear connector350(1) may engage respective interfacing structures380(1),380(2) with a friction fit, snap-fit, and/or mechanical interlock, for example.

InFIGS.6C-1 and6C-2, the headgear connector350(2) includes aheadgear clip receptacle354 adapted to be engaged with a clip (not shown) provided to a strap of the headgear (not shown), an hourglass-shaped or number eight-shaped opening356(2) adapted to be engaged with the second interfacing structure380(2) at the lower side of the frame, and a cutout358(2) adapted to be engaged with a lower portion of the first interfacing structure380(1) at the upper side of the frame. The opening356(2) and cutout358(2) of the headgear connector350(2) may engage respective interfacing structures380(2),380(1) with a friction fit, snap-fit, and/or mechanical interlock, for example.

InFIGS.6D-1 and6D-2, the headgear connector350(3) is in the form of a forehead support including spaced apart openings356(3) adapted to be engaged with respective pegs of the third interfacing structure380(3) at the top of the frame and openings for attaching respective straps of the headgear. The openings356(3) of the headgear connector350(3) may engage respective pegs of the third interfacing structure380(3) with a friction fit, snap-fit, and/or mechanical interlock, for example.

It should be appreciated that the headgear connectors may have other suitable styles or arrangements. For example, rather than a forehead support, the headgear connector350(3) may provide an upper headgear clip receptacle or an upper support member adapted to support a forehead support. Also, in an alternative embodiment, a vertical headgear strap may be structured to directly engage the pegs of the third interfacing structure380(3).

In use, headgear connectors are selected for use with a particular headgear. That is, each different style of headgear may be associated with headgear connectors having features (i.e., openings having a unique profile, shape, or arrangement) that prevent them from being assembled to the frame in the incorrect position. For example, the headgear connector350(1) shown inFIGS.6B-1 and6B-2 may be associated with headgear having side straps adapted to be positioned at an upper side of theframe320. The opening356(1) and cutout358(1) of the headgear connector350(1) provide a unique shape that ensures that headgear connector350(1) is connected to theframe320 at first interfacing structure380(1) on an upper side of the frame, rather than at the second interfacing structure380(2) on a lower side of the frame320 (i.e., protrusion380(1) only allows opening356(1) to pass). The headgear connector350(3) providing a forehead support may be attached to the top of the frame when headgear having upper side straps is provided, for example.

Thus, the protrusion/opening arrangement (also referred to as poka-yoke design) ensures that only the correct positioning of the headgear connectors for a particular headgear can take place. This arrangement ensures that headgear is correctly assembled to the frame, which leads to correct sealing vectors and improved comfort.

It should be appreciated that the protrusion/opening may have other suitable shapes, and the protrusions may be located in other suitable positions on the frame for attaching headgear connectors or other suitable accessories. In addition, the positioning of the protrusion/opening may be reversed, e.g., opening on frame and protrusion on headgear connector.

4. Fourth Embodiment of Common Frame and Interchangeable Headgear Connector

FIGS.7A to7C illustrate a common oruniversal frame420 with interchangeable and/orslidable headgear connectors450 for a mask system according to another embodiment of the present invention. In this embodiment, the mask system includes a nasal interface. Similar to the embodiments described above, this arrangement allows multiple headgear styles to be used with one frame so that different headgear may be mixed and matched with the frame, e.g., depending on patient preference and/or fit.

Thecommon frame420 includes amain body422 and a central bore or annularelbow connection seal424 adapted to engage an elbow assembly. Moreover, thecommon frame420 is structured to be selectively and removably coupled to one or more headgear connectors450 (also referred to as attachment clips or sliders). The one ormore headgear connectors450 are selectively arranged on theframe420 for use with a respective headgear.

Specifically, theframe420 includes aslider support structure490 adapted to removably and slidably support one ormore headgear connectors450. Eachheadgear connectors450 is slidable along theslider support structure490 to one of multiple positions. This arrangement allows one ormore headgear connectors450 to be attached to the frame in different positions for use with different headgear arrangements.

In the illustrated embodiment, theslider support structure490 extends along side and top portions of the frame. However, other suitable arrangements are possible, e.g., slider support structure provided along bottom portion of the frame. As best shown inFIG.7B-1, theslider support structure490 includes spaced apartwalls492 each having an inwardly directedflange494 to prevent the one ormore headgear connectors450 from being pulled outwardly from the frame.

Eachheadgear connector450 includes a T-shapedportion402 adapted to be slidably engaged with the slider support structure490 (e.g., seeFIG.7B-1) and aclip receptacle404 adapted to be engaged with a clip (not shown). The clip may be provided to a strap of the headgear or other accessory, e.g., forehead support.

In use, one ormore headgear connectors450 are positioned on theframe420 for use with a particular headgear. That is, one ormore headgear connectors450 are slid along theslider support structure490 to a certain position, e.g., depending on the headgear arrangement. The slider support structure and/or headgear connector may include a locking arrangement to lock the headgear connector in position. For example, theheadgear connector450 may be rotatable with respect to theslider support structure490 between unlocked and locked positions.FIG.7B-2 shows theheadgear connector450 in an unlocked position that allows theheadgear connector450 to slide freely along theslider support structure490, andFIG.7B-3 shows theheadgear connector450 rotated or spun to a locked position that locks theheadgear connector450 in position. In an alternative embodiment, a screw or movable locking member (e.g., push-button release) may be provided to the headgear connector that is adapted to engage the slider support structure to lock the headgear connector in position.

Also, alignment indicators may be provided to the slider support structure and/or headgear connector to indicate the headgear connector's position. In an embodiment, the headgear may be provided with a particular setting of the headgear connectors' positioning.

FIG.7C illustrates an embodiment of aslider support structure490 wherein eachflange494 includes ascalloped edge495. In such an arrangement, each headgear connector may include an interface adapted to be squeezed between the opposing scalloped edges495. For example, as shown inFIG.7C, the headgear connector may include aratcheting mechanism405 includingend portions407 adapted to engage theedges495 and a biasing member409 (e.g., spring) adapted to resiliently bias or force theend portions407 into engagement with theedges495. In use, the scallopededges495 will hold theratcheting mechanism405 in a desired position (as shown in solid lines) and theratcheting mechanism495 may be squeezed so that it can compress and move along theslider support structure490 into another position (as shown in dashed lines). The scalloped edges495 may provide audible feedback as the headgear connector is slid to a desired position, e.g., clicking.

While the invention has been described in connection with what are presently considered to be the most practical and preferred embodiments, it is to be understood that the invention is not to be limited to the disclosed embodiments, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. Also, the various embodiments described above may be implemented in conjunction with other embodiments, e.g., aspects of one embodiment may be combined with aspects of another embodiment to realize yet other embodiments. Further, each independent feature or component of any given assembly may constitute an additional embodiment. In addition, while the invention has particular application to patients who suffer from OSA, it is to be appreciated that patients who suffer from other illnesses (e.g., congestive heart failure, diabetes, morbid obesity, stroke, bariatric surgery, etc.) can derive benefit from the above teachings. Moreover, the above teachings have applicability with patients and non-patients alike in non-medical applications.

Claims (30)

What is claimed is:

1. A mask system for delivering a supply of air generated by a flow generator at a positive pressure in a therapeutic range to a patient's airways to treat sleep disordered breathing, the mask system comprising:

a cushion configured to seal with the patient's face in use;

a mask frame attached to the cushion, the mask frame being constructed from a first substantially rigid, non-malleable plastic material, the mask frame having a front surface opposite the cushion and a bore projecting from the front surface to form a hole, and the mask frame having a curved interfacing structure projecting radially from the bore, and said mask frame having no built-in or integral headgear attachment points;

headgear comprising:

a rear portion configured to engage the occiput of the patient's head in use;

a pair of upper side straps extending from the rear portion, each of the upper side straps being configured to pass above a corresponding one of the patient's ears in use;

a pair of lower side straps extending from the rear portion, each of the lower side straps being configured to pass below a corresponding one of the patient's ears in use; and

a pair of lower headgear clips configured to receive respective ones of the pair of lower side straps;

an elbow assembly configured to be connected to an air delivery tube to deliver the supply of air to the patient's airways; and

a headgear connector detachably connected to the mask frame by translating the mask frame and the headgear connector towards one another along the common axis until a snap-fit connection is established between the headgear connector and the curved interfacing structure of the mask frame, the headgear connector including a pair of lower headgear clip anchors configured to be engaged with respective ones of the lower headgear clips to attach respective ones of the lower side straps, and the headgear connector being constructed from a second substantially rigid, non-malleable plastic material,

wherein the mask frame and the headgear connector are constructed to resist movement between the mask frame and the headgear connector when said mask frame and said headgear connector are attached.

2. The mask system according toclaim 1, wherein the headgear connector does not include a forehead support.

3. The mask system according toclaim 1, wherein the mask frame and the cushion are configured to deliver the supply of air to the patient's nose and mouth.

4. The mask system according toclaim 1, wherein the cushion and the mask frame are permanently attached.

5. The mask system according toclaim 1, wherein the mask system further comprises a vent for gas washout.

6. The mask system according toclaim 1, wherein at least a portion of the headgear connector is shaped to conform to a portion of the mask frame.

7. The mask system according toclaim 1, wherein the headgear connector and the mask frame are non-malleable.

8. The mask system according toclaim 1, wherein:

the mask frame and the cushion are configured to deliver the supply of air to the patient's nose and mouth,

the cushion and the mask frame are permanently attached,

the mask system further comprises a vent for gas washout,

at least a portion of the headgear connector is shaped to conform to a portion of the mask frame, and

the headgear connector and the mask frame are non-malleable.

9. A mask system for delivering a supply of air generated by a flow generator at a positive pressure in a therapeutic range of 2-30 cm H₂O to a patient's airways to treat sleep disordered breathing, the mask system comprising:

a mask frame having a bore and a curved interfacing structure, the bore being structured to convey the supply of air to the patient's airways in use, the curved interfacing structure projecting from the bore in a radial direction, and the mask frame having no built-in or integral headgear attachment points;

a cushion provided to the mask frame and configured to seal with the patient's face in use;

headgear comprising:

a rear portion configured to engage the occiput of the patient's head in use;

a pair of upper side straps extending from the rear portion, each of the upper side straps being configured to pass above a corresponding one of the patient's ears in use;

a pair of lower side straps extending from the rear portion, each of the lower side straps being configured to pass below a corresponding one of the patient's ears in use; and

a pair of lower headgear clips configured to receive respective ones of the pair of lower side straps;

an elbow assembly configured to be connected to an air delivery tube to deliver the supply of air to the patient's airways; and

a headgear connector configured to engage the curved interfacing structure with a snap-fit, the headgear connector having an opening with a closed shape, the headgear connector including a pair of lower headgear clip anchors configured to engage with respective ones of the pair of lower headgear clips to attach respective ones of the pair of lower side straps, and the headgear connector including a pair of openings configured to attach to respective ones of the pair of upper side straps,

wherein the mask frame and the headgear connector are constructed to resist movement between the mask frame and the headgear connector when the mask frame and the headgear connector are attached, and

wherein the mask frame is more rigid than the cushion.

10. The mask system according toclaim 9, wherein:

the bore has a cylindrical shape structured to convey the supply of air to the patient's airways in use,

the curved interfacing structure is ring-shaped, and

the opening of the headgear connector has a circular shape.

11. The mask system according toclaim 9, wherein the headgear connector does not include a forehead support.

12. The mask system according toclaim 9, wherein the mask frame and the cushion are configured to deliver the supply of air to the patient's nose and mouth.

13. The mask system according toclaim 9, wherein the cushion and the mask frame are permanently attached.

14. The mask system according toclaim 9, wherein the mask system further comprises a vent for gas washout.

15. The mask system according toclaim 9, wherein at least a portion of the headgear connector is shaped to conform to a portion of the mask frame.

16. The mask system according toclaim 9, wherein the headgear connector is removably attachable to the mask frame.

17. The mask system according toclaim 9, wherein the headgear connector and the mask frame are non-malleable.

18. The mask system according toclaim 9, wherein:

the mask frame and the cushion are configured to deliver the supply of air to the patient's nose and mouth,

the cushion and the mask frame are permanently attached,

the mask system further comprises a vent for gas washout,

at least a portion of the headgear connector is shaped to conform to a portion of the mask frame,

the headgear connector is removably attachable to the mask frame, and

the headgear connector and the mask frame are non-malleable.

19. A mask system for delivering a supply of air generated by a flow generator at a positive pressure in a therapeutic range of 2-30 cm H₂O to a patient's airways to treat sleep disordered breathing, the mask system comprising:

a mask frame having a bore and a curved interfacing structure, the curved interfacing structure projecting radially from the bore, the mask frame having no built-in or integral headgear attachment points;

a cushion provided to the mask frame and configured to seal with the patient's face;

an elbow assembly configured to be connected to an air delivery tube to deliver the supply of air to the patient's airways;

headgear comprising:

a rear portion configured to engage the occiput of the patient's head in use;

a pair of upper side straps extending from the rear portion, each of the upper side straps being configured to pass above a corresponding one of the patient's ears in use;

a pair of lower side straps extending from the rear portion, each of the lower side straps being configured to pass below a corresponding one of the patient's ears in use; and

a pair of lower headgear clips configured to receive respective ones of the pair of lower side straps; and

a headgear connector having a headgear connector opening, the headgear connector being configured to engage the curved interfacing structure of the mask frame to removably connect the headgear connector to the mask frame, the bore and the headgear connector opening being disposed about a common axis when the headgear connector and the mask frame are connected,

wherein the headgear connector and the mask frame are non-malleable,

wherein the headgear connector and the mask frame are detachably connected together by translating the mask frame and the headgear connector towards one another along the common axis until a snap-fit connection is established between the headgear connector and the curved interfacing structure of the mask frame,

wherein the headgear connector includes a pair of lower headgear clip receptacles configured to be engaged with respective ones of the pair of lower headgear clips to attach respective ones of the pair of lower side straps,

wherein the mask frame and the headgear connector are constructed to resist movement between the mask frame and the headgear connector when the mask frame and the headgear connector are attached, and

wherein the headgear connector includes a pair of upper openings configured to attach to respective ones of the pair of upper side straps.

20. The mask system according toclaim 19, wherein the headgear connector opening is circular, and

wherein the bore and the headgear connector opening are concentrically disposed about the common axis when the headgear connector and the mask frame are connected.

21. The mask system according toclaim 19, wherein the headgear connector does not include a forehead support.

22. The mask system according toclaim 19, wherein the mask frame and the cushion are configured to deliver the supply of air to the patient's nose and mouth.

23. The mask system according toclaim 19, wherein the cushion and the mask frame are permanently attached.

24. The mask system according toclaim 19, wherein the mask system further comprises a vent for gas washout.

25. The mask system according toclaim 19, wherein at least a portion of the headgear connector is shaped to conform to a portion of the mask frame.

26. The mask system according toclaim 19, wherein:

the mask frame and the cushion are configured to deliver the supply of air to the patient's nose and mouth,

the cushion and the mask frame are permanently attached,

the mask system further comprises a vent for gas washout, and

at least a portion of the headgear connector is shaped to conform to a portion of the mask frame.

27. A mask system for delivering a supply of air generated by a flow generator at a positive pressure in a therapeutic range of 2-30 cm H₂O to a patient's airways to treat sleep disordered breathing, the mask system comprising:

a mask frame having a bore and a curved interfacing structure, the curved interfacing structure projecting radially from the bore, the mask frame having no built-in or integral headgear attachment points;

a cushion provided to the mask frame and configured to seal with the patient's face;

an elbow assembly configured to be connected to an air delivery tube to deliver the supply of air to the patient's airways;

a vent for gas washout;

a headgear connector having a headgear connector opening, the headgear connector being configured to engage the curved interfacing structure of the mask frame to removably connect the headgear connector to the mask frame, the bore and the headgear connector opening being disposed about a common axis when the headgear connector and the mask frame are connected; and

headgear configured to be attached to the headgear connector to hold the cushion in a sealing position on the patient's face in use,

wherein the headgear connector and the mask frame are non-malleable,

wherein the headgear connector and the mask frame are detachably connected together by translating the mask frame and the headgear connector towards one another along the common axis until a snap-fit connection is established between the headgear connector and the curved interfacing structure of the mask frame, and

wherein the mask frame and the headgear connector are constructed to resist movement between the mask frame and the headgear connector when the mask frame and the headgear connector are attached.

28. The mask system according toclaim 27, wherein the headgear connector opening is circular, and

wherein the bore and the headgear connector opening are concentrically disposed about the common axis when the headgear connector and the mask frame are connected.

29. The mask system according toclaim 27, wherein the headgear connector does not include a forehead support.

30. The mask system according toclaim 27, wherein:

the headgear includes a pair of upper side straps configured to extend above the patient's ears in use, a pair of lower side straps configured to extend below the patient's ears in use, a rear portion configured to engage the occiput of the patients head in use, and a pair of lower headgear clips configured to receive respective ones of the pair of lower side straps,

the headgear connector includes a pair of lower headgear clip receptacles configured to be engaged with respective ones of the pair of lower headgear clips to attach respective ones of the pair of lower side straps,

the headgear connector includes a pair of upper openings configured to attach to respective ones of the pair of upper side straps,

the mask frame and the cushion are configured to deliver the supply of air to the patient's nose and mouth, and

the cushion and the mask frame are permanently attached.

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